Sheet-metal bolt.



G. W. BOWEN.

SHEET METAL BOLT.

APPLICATION men NOV. 16. 1911.

Patented Dec. 7. 1915.

ATTORNEYS GEORGE w. BOWEN, or AUBURN, NEW YORK.

v SHEET-METAL BOLT.

Specification of Letters Patent.

Patented Dec. 7, 19 15.

Original application filed November 6, 1911, Serial Nc. 658,799. Divided and this application filed November 16, 1911. Serial No. 660,704. Y

I?) all whom it may concern: I

" Auburn, in the county of Cayuga and State of New York, have invented a new and useful Sheet-Metal Bo1t, of whichthe following is .aspecification. a

This invention has for its object the production of a sheet metal bolt which is economical in manufacture and of great strength and durability in use; and it consists in the bolt embodying the novel features hereinafter set forth and claimed.

In describing this invention reference is my sheet metal bolt, the contiguous parts of a spring and the link or shackle connecting the spring to another spring or to the body of a motor vehicle being shown. Fig. 2 is a fragmentary view of two vehicle springs connected by a shackle, each of the joints between the springs and the shackle being provided with my bolt. Fig. 3 is an elevation of the head and contiguous portion of the shank of the bolt shown in Fig. 1. Figs. 4 and areend views looking lengthwise of the shank toward the head, illustrating slightly modified forms of my bolt.

This bolt,.comprises, generally, an elongated tubular shank or body portion 1, and an integral tubular head 2 at one end of the shank, the head and shank being formed of sheet metal and the shank being compressed into a tube of less diameter than the head so that the walls of the tube are relatively thick, and the thickest portions of such walls are located adjacent the head at 3 and near the free end of the bolt as at 4, these thickened portions being located in such position as to strengthen the shank at the points the shearing strain is received by the shank as hereinafter set forth. The shank is also closed at its free end, and the portion thereof adjoining the closed end is compressed to form a thread receiving nipple 5, of less diameter than the major part of the shank, such compression thickening the walls of the nipple so that threads can be cut thereon and a groove for receiving a .nut lock out therein, without unduly weakening the bolt and also thickening the bolt adjacent the nipple, as at 4. Said shank or body Be it known that I, GEORGE WV. BOWEN,-0f

portionl is preferably of greater length than the head 2 and is provided with a smooth peripheral wearing surface between the nipple .5 and the head, and with 'a lubricant conducting perforation -13 openin from the bore of the shank through sai surface. is preferably of materially greater diameter than the bore of the shank or body portion 1 and said chamber and bore are in open communication with each other. a

6 is a link or shackle, such as usually connects springs 7 and 8 or connects one spring and the frame of a motor vehicle, each so The internal chamber of the head spring 7 or 8 having a bearing as 9 at one end a on the spring bolt, such bearing 9 fitting between the opposite sides of the shackle 8, so

that the shearing strain is transmitted to the shank of the bolt near the thickened and lc)orlnpressed points 3 and l of the walls of the In order to prevent the bolt from turning relatively to the shackle it may be corrugated as shown at 10, Fig. 3, adjacent the head for fitting the opening in the shackle for the bolt, or as seen in Figs 4 and 5, the

bottom of the head of the bolt may be formed non-circular as at 11 and 12 for fitting correspondingly shaped sockets in the shackle 6. Endwise movement of the bolt relatively to its support, as the part 6, may

be prevented by a nut 19 screwing-on the nipple 5 and by the opposing end'face 20.0f the head 2. p A

By holding the bolt from turning the bearing 9 of the spring turns on the bolt during the movement of the spring, instead of the bolt turning in the shackle, and thus the bearing 9 receives the benefit of the lubricant passing through the'perforation 13 in the bolt into the hearing.

I have here shown the head 2 of the bolt as provided with a closure 14 in the form of a receptacle threading into the head, the

closure carrying means as a screw 15 which. ,operates a plunger or follower 16 within closure. The folloi've'r 16 't1glitly fits the barrel portion of the closure 14 so that it will not turn with the screw lfi.

by boring out a solid bolt and attaching a grease cup thereto. This bolt is a radically .difierent, -artiele *f1-'onnany sheet metal 2 .1--

ticle heretofore made, I I I r The process by whi cli this spring bol t is formed constitutes the subject-matter of'my ,Ifatent Xo. l ,0.l,66), issued March #1913, l ithi's'fa pplicati on is iih diiiisioli of the pplicatioii ifgsllltlllglll sa id ',p a' tent.i

\Vhatfl ol'ainris; ll As a 11\\;; a -t x llow bolt fanned sheet m etall and C0111- isi'ng a i"elo 11gatedtuliulaijshank and a at a e dtlieshmkftlk shank'be ing; compressed into an f'elonga t'ed ,tiibe of less diameter, and having its was of greater thicknes's'fthan the'headlaind thewalls of the shank, being of increased thicl' ness ad- }joiningthe he'ad s 'ibst antially as and for beds Y 2,;As a'ne\ 1 018 ofinanufactiire a hol- 80 thehead and ,tl1e" opposite end of the bolt for receiving shearing" strain on the'lholt,

substantially as and for the purpose de- 3. Asa new article of1na nufacture,a bolt ,pressed into-Ha thread recei ving nipple of i role of Inanuiacture, a

7 "low spring bolt formed of sheet metal'and eomp'risingfan, elongated hollow shank, and head at one end p a1e1amkh Walls of I the. shah-kbeing oiigihcreased thickness near thereofa djoinin g', the closed end being corm.

r I 2-: I; less diametei-Jthan the major portion of the stem, the shank being compressed into a tube ot less diameter, and having its walls of Heretofore spring bolts have been made greater thickness than, the head, and the walls of the shank being of increased thickness adjoining the head and near the juncture of said reduced threaded portion, and the major part ofthe shank, substantiallv as "and for the purpose set forth.

' 4; A lubricant bolt struck from sheet metal and including a eup-shaped head, a hollow cylindrical shank closed at the end thereof remote fromthe head,the free end portion of the shank beingrednced so that it "is of less diameter than the major part of the shank, the shank having an outlet leading from its interior and through its periphtry, the wall of the shank gradually thick ening from the reduced end portion toward the-head and being thickest at the juncture of the head of the shank, and the wall of said reduced portion thickening from the free end of the reduced portion toward the -1n'ajo1' part of the shank and being thickest at the juncture of the said reduced portion and the major part of the shank and the shank meeting the head at substantially a right angle whereby a shoulder is provided on the bottolnof the head, and means for compressing lubricant in the head, substantially as and for'the purpose described.

In testimony whereof, I have hereunto lsigned my name in the presence of two attesting witnesses, at Syracuse, in the county of Ono'ndeg-g in the State of New York this 1st day of November 1911., I I

v GEORGE W. BOWEN. ilwitnessesz SOPHIA Davis,

.L'ILLIAN M. Davis. 

